Add LayoutOpportunityIterator method to NGConstraintSpace

third_party/WebKit/Source/core/layout/ng/ng_layout_opportunity_iterator.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NGLayoutOpportunityIterator_h
 #define NGLayoutOpportunityIterator_h
 
 #include "core/CoreExport.h"
-#include "core/layout/ng/ng_constraint_space.h"
 #include "core/layout/ng/ng_layout_opportunity_tree_node.h"
 #include "platform/heap/Handle.h"
 #include "wtf/Optional.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
+class NGConstraintSpace;
 typedef NGLogicalRect NGLayoutOpportunity;
 typedef Vector<NGLayoutOpportunity> NGLayoutOpportunities;
 
 class CORE_EXPORT NGLayoutOpportunityIterator final {
-  STACK_ALLOCATED();
-
  public:
   // Default constructor.
   //
   // @param space Constraint space with exclusions for which this iterator needs
   //              to generate layout opportunities.
   // @param opt_origin_point Optional origin_point parameter that is used as a
   //                         default start point for layout opportunities.
   // @param opt_leader_point Optional 'leader' parameter that is used to specify
   //                         the ending point of temporary excluded rectangle
   //                         which starts from 'origin'. This rectangle may
@@ skipping 21 matching lines @@
   const NGConstraintSpace* constraint_space_;
 
   NGLayoutOpportunities opportunities_;
   NGLayoutOpportunities::const_iterator opportunity_iter_;
   Persistent<NGLayoutOpportunityTreeNode> opportunity_tree_root_;
 };
 
 }  // namespace blink
 
 #endif  // NGLayoutOpportunityIterator_h